Observed intensification of precipitation extremes, responsible for extensive societal impacts, are widely attributed to anthropogenic sources, which may include indirect effects of agricultural irrigation. However quantifying the effects of irrigation on far-downstream climate remains a challenge. We use three paired Community Earth System Model simulations to assess mechanisms of irrigation-induced precipitation trends and extremes in the conterminous US and the effect on the terrestrial carbon sink. Results suggest precipitation enhancement in the central US reduced drought conditions and increased regional carbon uptake, while further downstream, the heaviest precipitation events were more frequent and intense. Specifically, moisture advection from irrigation in the western U.S. and recycling of enhanced local convective precipitation produced very-heavy storm events that were 11% more intense and occurred 23% more frequently in the densely populated greater New York City region.
Environmental Protection Bureau of the New York State Office of the Attorney General
A report on current and future trends in extreme rainfall in New York State, including case studies of extreme rainfall in Long Island, during Hurricane Irene, and in Cattaraugus, Chautauqua, and Erie counties in Western New York.
Geographic Focus: Dutchess County, NY|Orange County, NY|Columbia County, NY
Walter, M. Todd, DeGaetano, Arthur T., Meyer, Andrew, Marjerison, Rebecca
A report on a project to identify undersized culverts, for both current and future precipitation conditions. Undersized culverts often present increased risks of wash-outs or overtopping during storms, which can present safety risks in communities. Having the information necessary to upsize culverts proactively can allow communities to improve their climate resilience. The specific objectives were to determine the capacity of culverts within the study watersheds, calculate the peak storm discharge at each culvert for current and future precipitation conditions and compare runoff to capacity to identify culverts that are currently undersized, and those which are likely to be undersized in the future. An online culvert-capacity calculator was also to be developed.
Information about the Syracuse, NY area's Save the Rain program, a comprehensive stormwater management plan intended to reduce pollution to Onondaga Lake and its tributaries. The website contains lists of milestones, examples of "green" and "gray" projects, funding information, and other resources.
Data Product, Dataset, Decision Support, Map Viewer
Geographic Focus: New York|New England
Northeast Regional Climate Center (NRCC), National Resources Conservation Service (NRCS)
Northeast Regional Climate Center (NRCC)
A website where users can view and download extreme precipitation data, plots, and maps for New York State and New England. The site includes estimates of extreme rainfall for various durations (from 5 minutes to 10 days) and recurrence intervals (1 year to 500 years). These data are interpolated to a 30-second grid. Confidence intervals for these values are also included as are the partial duration rainfall series used in their computation. Regional extreme rainfall maps and graphic products are also available. Precipitation distribution curves can be generated for each grid either directly or from the USDA NRCS Win TR-20 software, eliminating the need to use a static Type II or Type III curve.
Driscoll, C. T., Eger, C. G., Chandler, D. G., Davidson, C. I., Roodsari, B. K., Flynn, C. D., Lambert, Kathy Fallon, Bettez, N. D., Groffman, P. M.
A report on the strengths and limits of green infrastructure for managing stormwater. Researchers gathered data on the performance of eight green infrastructure technologies, including green roofs, grassed swales, constructed wetlands, and porous pavement. They analyzed their effectiveness at reducing storm water volume in summer and winter, as well as six common pollutants. They found that green infrastructure holds great promise but performance varies by technology, season, and site.
The New York State Stormwater Management Design Manual provides designers with a general overview on how to size, design, select, and locate stormwater management practices at a development site to comply with State stormwater performance standards. The manual also contains appendices with more detailed information on landscaping, stormwater management practice construction specifications, step-by-step stormwater management practice design examples and other assorted design tools. This manual is intended primarily for engineers and other professionals who are engaged in the design of stormwater treatment facilities for new developments. Users are assumed to have a background in hydrology, hydraulics, and runoff and pollutant load computation. It is not intended to be a primer on any of these subjects.
Data Product, Dataset, Decision Support, Map Viewer
Geographic Focus: United States of America
United States Energy Information Administration (EIA)
A flood vulnerability assessment map. Flood hazard information from FEMA has been combined with the U.S. Energy Information Administration's energy infrastructure layers as a tool to help state, county, city, and private sector planners assess which key energy infrastructure assets are vulnerable to rising sea levels, storm surges, and flash flooding. Note that flood hazard layers must be zoomed-in to street level before they become visible. Data sources and downloads are available; for time periods of data sources and more information, please click on the "layer information and map data" link below the map.